Oil and air centralized lubrication systems are used to supply high-speed rolling bearings in tool spindles. The bearings are supposed to be supplied with extremely small quantities of lubricant (minimal-quantity lubrication) in the case of these applications. The oil to be delivered is fed in the line to the bearing as a thin flow of lubricant along the wall.
The oilstreak sensor makes it possible to monitor the transport of a fine current of oil along the secondary line’s wall downstream of the oil and air mixing point. The closer the sensor is located to the lube point, the more reliable the system monitoring.